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lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them. This open source utility was developed and supported by Victor A. Abell, the retired Associate Director of the Purdue University Computing Center.
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. GNU Core Utilities include basic file, shell and text manipulation utilities. Coreutils includes all of the basic command-line tools that are expected in a POSIX system.
The Single UNIX Specification (SUS) specifies that a series of tests are performed on the file specified on the command line: if the file cannot be read, or its Unix file type is undetermined, the file program will indicate that the file was processed but its type was undetermined. file must be able to determine the types directory, FIFO ...
Change the file ownership PDP-7 UNIX cksum: Filesystem Mandatory Write file checksums and sizes 4.4BSD cmp: Filesystem Mandatory Compare two files; see also diff Version 1 AT&T UNIX comm: Text processing Mandatory Select or reject lines common to two files Version 4 AT&T UNIX command: Shell programming Mandatory Execute a simple command ...
Unix directories do not contain files. Instead, they contain the names of files paired with references to so-called inodes, which in turn contain both the file and its metadata (owner, permissions, time of last access, etc., but no name). Multiple names in the file system may refer to the same file, a feature termed a hard link. [1]
Some commands, such as echo, false, kill, printf, test or true, depending on your system and on your locally installed version of bash, can refer to either a shell built-in or a system binary executable file. When one of these command name collisions occurs, bash will by default execute a given command line using the shell built-in. Specifying ...
In Unix-like operating systems, any file or folder that starts with a dot character (for example, /home/user/.config), commonly called a dot file or dotfile, is to be treated as hidden – that is, the ls command does not display them unless the -a or -A flags (ls -a or ls -A) are used. [5]
The rm (delete file) command removes the link itself, not the target file. Likewise, the mv command moves or renames the link, not the target. The cp command has options that allow either the symbolic link or the target to be copied. Commands which read or write file contents will access the contents of the target file.